no main manifest attribute, in xxx.jar

使用Docker运行一个SpringBoot应用时，出现如下图所示的错误信息

解决方案： SpringBoot应用的pom.xml文件中添加以下配置;重新打包即可

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>


                <version>2.6.13version>
                <configuration>



                    <mainClass>com.idooy.gulimall.gateway.GulimallGatewayApplicationmainClass>









                configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackagegoal>
                        goals>
                    execution>
                executions>
            plugin>
        plugins>
    build>    

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